Pressing machine and control mechanism



Dec. 7, 1937. J. P. DALY PRESSING MACHINE AND CONTROL MECHANISM FiledOct. 6, 1934 4 Sheets-Shet 1 mvzm'ok P. DA LY JOSEPH I i BY 4 1101111126Dec. 7,1937. J P, Y 2,101,021

PRESSING MACHINE AND CONTROL MECHANISM Filed Oct. 6, 1934 4 Sheets-Sheet2 INVENfOR JOSEPH R DALY I De; 7,1937.

J. P. DAILY 2,101,021

PRESSING MACHINE AND CONTROL MECHANISM Filed Oct. 6, 1934 4 Sheets-Sheet s JOSEPH P. DALY AITORNEYJ Dec. 7, 1937.

J. P. DALY PRESING MACHINE AND CONTROL MECHANISM 4 Shts-Sheet 4 A FiledOct. 6, 1934 FlG.-4

INVENTOI? JOSEPH P. DALY ATTC%- Patented Dec. 7, 1937 UNITED STATESPRESSING MACHINE" AND CONTRO MECHANISM 1 Joseph P. Daly, New York, N.Y., assignor to The American Laundry Machinery Company, Norwood, Ohio, acorporation of Ohio Application October 6, 1934, Serial No. 747,173

22 Claims.

This invention relates to pressing machines such as are used for laundryor garment pressing 'workn The invention has relation both to theoperating means and mechanism forproducing 5 relative-motion of thepressing members and to the control means for the power mechanism usedfor operating the press.

The invention has more particular relation to that type of press inwhich the pressing members are relatively movable toward and from eachother both to preliminarily close them upon the Work and to producefinal 'or heavy pressure for the pressing operation, either or both ofthe preliminary closing and final pressure movements being produced bypower means, andmore particularly to such a press in which the powertransmitting mechanism for operating the pressing members includesseparable parts adapted to be coupled or uncoupled, and which transmitthe power effect of the motor to the pressing members only when they arecoupled.

One object of the invention is to provide a press of this kind whichincludes two hand control means which compels the operator to keep 2.,both of his hands busy inorder to bring the parts to that position .inwhich the pressing members are preliminarily closed and the separableparts are coupled to establish power transmitting relation between themotor means and the pressing members in order to instigate the finalpressure effect, thus safeguarding the operator against injury. 1

Another object of the invention is to provide a press of this kindincluding two distinct motor means, one of which operates to couple the-sep' arable parts and the other of which operates the pressing membersfor the production of final heavy pressure, together with two handcontrol means for one or both of said motor means with 41) itsconsequent safeguardingeffect.

Another object of the invention is to provide a press-of the kind inwhich one motor means is utilized both for preliminarily closingthepress and for coupling the separable parts, and a second motor meansis utilized for producing final heavy pressure for the pressingoperation, the press preferably also including safeguarding two handcontrol means.

. A further object of the invention is to provide one of which producespreliminary press closing movement or part thereof, and the other ofwhich is arranged to produce final heavy pressure, one of said motormeans being also arranged to function as a transmitter of pressure tothe other or a press including two fluid pressure-motor means,

as a pump to produce pressure for operating the other, with consequentinterconnection and the ability to control both of the motors by one setof control devices.

A further object of the invention is to provide a press of this kindincluding two fluid pressure motors, one of which first operates as apump to supply pressure for the other and second, as a motor means totransmit power effect directly to the pressing members. H

Another'object of my inven on is'to provide a press of the classdescribed including cooperating pressing members, means for causingpressure therebetween including a fluid actuatedmotor,'*

parts normally ineffective to transmit motion until the press ispreliminarily closed,,means for preliminarily closing the press andcoupling said parts'in effective position, and means preventing themachine going into final pressure, even though the press has reached itspreliminarily closed position, until after the operator releases acontrol member for the motor.

Other objects and advantages will be appar-'. ent to those skilled intheart and include the novel mechanisms and devices described intheaccompanying specification and-disclosed in the drawings. 7 1

In the drawings, Figll is a view of a press embodying my invention withthe pressing mern'' bers in open position and with certain of the partsbroken away to more clearly disclose the structure; Fig. 2 isa viewsimilar to Fig. 1, with the pressing members in closed position and withcertain structural portions in section; Fig. 3 is a diagrammatic layoutof a control mechanism for my press; Figs. 4 and 5illustrate amodification of a portion of the mechanism illustrated in Figs. 1, 2,and 3, in Fig. 4 the parts are .in pressopen position and in Fig. 5 theyare in pressclosed position; Fig. 6 is a sectional view along line 6-6of Fig. 5; while Fig. 7 is a sectional view along the line 1--'| of Fig.6. 5

The embodiment of myinventive concept disclosedin Figs. 1 to3..comprises a stationarypressing bed member l0 mounted on a suitableframe II, and a cooperating pressing head member l2 carried by a headlever l3 which is pivotally mounted at H on the frame. Mechanism forclosing the press comprises a cylinder and piston motor l5 yieldinglymounted on the frame at I6, as will be hereinafter more particularlydescribed, and provided wltha piston l1 and a piston rod I8 pivotallyconnected at Is to a power lever 20 which in turn is pivotally mountedat 2| on the frame II. The connection, between the power lever and thehead lever for moving the latter into final pressing position includes astrut 22 pivotally connected to the head lever at 23 and normally inuncoupled or ineffective position as indicated in Fig. 1. Motiontransmitting mechanism connected between the motor l5 and head lever l3for preliminarily closing the press includes a fluid actuated motor.24which also actuates a bellcrank 25 which moves strut 22 to coupled oreffective positionas seen in Fig. 2, when the press ispreliminarily-closed. These parts will now be described in greaterdetail.

A lost motion connection is provided between piston l1 and its-pistonrod l8, and the motion of the pistonduring the first portion of itsstroke is utilized ,to cause preliminary closing of the press. This lostmotion connection comprises a piston rod member l8 which is adapted totelescope within the rod l8 and is 'slidably secured therein by means ofa stud 25 threaded in the rod l8 and extending intoa slot 21 in the rodmember l8. rod portions l8 and I8 in their extended position. The pistonrod 8 is provided with the. usual packing gland 28 and thepiston I1 isprovided with oppositely facing cups 30 so that it may work against apressure fluid on either face.

The fluid motor 24 has a piston 3| connected by a rod 32 with the headlever at 33. It is desirable that the motor 24 act upon the head |2 withless power than the motor IS. TO this end, the cylinder of motor 24 ismade of less diameter than the cylinder of motor [5, and the rod 32 ispivoted to the head lever with less of a lever arm than the strut 22.The upper end of the press closing cylinder 3|' is provided with a vent34. The lower end of cylinder 3|.is pivotally mounted at 35 on one armof the bellcrank 25, which in turn. is pivotally mounted at 36 on thepower lever 26. The other arm of b ellcrank 25 carries members 31 and 38which lie on opposite sides of strut 22 for the purpose of moving thestrut about its pivot 23 as the bellcrank oscillates'about its pivot 36.The lower end of cylinder 3| is connected by conduit 39 with the lowerend of cylinder l1 so that fluid compressed upon movement of piston |1downwardlyin its cylinder will be conducted to the lower face of piston3|. The lower end of cylinder 3| is also in communication with a,normally closed exhaust valve 40 operable by its valve stem 4| in a,manner hereinafter described. A spring 42 is connected between the rearend ofthe head lever and bellcrank 25 and normally tends to hold thehead in open'position and tobias the bellcrank 25 at thecounterclockwiselimit of its oscillation, as: viewed in Figs. 1 and 2.This counterclockwise movement is adjustably limited by a screw 43 whichcontacts a A spring 28 biases the piston a the end of the strut restsupon a hardened bearing block 50 which forms a part of the power lever.A spring-pressed buifer member 5| is secured to the lower end of, thestrut for the purpose of quietly guiding the strut into its effectiveposition.

Operator operated means is provided for controlling the flow of pressurefluid from a source 52 to motor l5. In the form disclosed this comprisesa pair of combined inlet and outlet valve casings 53 and 54 connected inseries. Each of these casings encloses a normally closed inlet valve 55,55' and a normally open exhaust valve 56, 56' mounted on .a common stem51, 51' for operation by a manual 58 and 58'. Conduit 59 connects valvecasing 53 with the supply conduit. Conduit 68 connects valve casings 53and 54, and conduit 6| connects valve casing 54with 'valve casing 62which in turn is connected with the upper end of cylinder I1 by means ofconduit 63. Connected with valve casing 53, or mounted separately ifdesired, is a normally closed pressure release valve 64 in a casing 65connected by conduit 66 with conduit 63, this release valve beingoperable by valve stem 61 and manual 68.

The function of the mechanism in casing 62 is to bypass the manuals 58and 58' and connect .the cylinder I1 directly with the source of fluidsupply upon the development of a predetermined pressure between thepressing members. The casing contains a normally open inlet valve 68biased in that direction by spring 10, and a normally closed inletvalvell biased in that direction by spring 12. It will be noted thatconduit 63 enters casing 62 intermediate these two valves, that spring12 is heavierthan spring 10, and that the-upper surface 'of the .valvedisk of valve 1| presents a greater area than the lower surface thereof,as viewed in Fig. 3. As aresult of this structure, pressure suppliedthrough conduit 6| is suflicient to retain valve 1| closed until it isopened-by mechanism about to be-described. Cylinder l1is-pivotallymounted at IS on an arm 13, which is pivotally connected at14 to a bracket 15 which forms part of a base plate connected with theframe. Arm 13 is biased away from the base plate by a spring 16 which isso calculated that is is compressed under a load slightly less than thepressure exerted by the motive fluid in cylinder I1 upon the effectivearea'of the upper-end thereof. The movement of arm 13 toward the baseplate is limited by a stop member.11.. Arm 13 carries a projection.

18 which. contacts 'the stem of valve 1| and is adapted to open'thevalve when spring 16 is compressed.

The operation of the mechanism thus far described is as follows: Withthe parts in the position of Figs. 1 and 3, the operator arranges thelay of the'work upon the bed l0 and actuates the manuals 58 and 58'. Itwill be 'noted that this is a well known structure which requires theuse of both hands to supply effective pressure fluid through conduit 6|,open valve 69 and conduit 63 to the upper face of piston I1. Piston llmoves downwardly in its cylinder; meanwhile the pressure in the'upperend of the cylinder remains at a low figure as long as the piston moveseasily. Air compressed in the lower portion of cylinder H by theadvancing piston travels through conduit 39 to cylinder 3| where it iseffective against the lower face of piston 3| to cause upward travelthereof and a corresponding movement of head I2 toward a preliminarilyclosed position. When the head reaches safe closed position in contactwith the bed (or'when the head meets' sufiicient obstruction anywhere inits downward course, as hereinafter discussed) the parts are soconstructed and arranged that piston I1 is somewhat short of contactwith the upper end of rod l8. At this time, the pressure against thelower face of piston H has built up to substantially line pressure dueto the obstruction which prevents further movement of piston 3|.Concurrently, the pressure on the upper face of piston H has built up toan equal degree and since further movement of piston H is prevented bythe fluid trapped therebeneath, cylinder II will move upwardlysufficient to compress spring 16, whereupon projection 18 opens valve Hand simultaneously closes valve 69. This establishes the bypass aroundthe manually operated valves in casings 53 and 54 so that the upperportion,

of cylinder I1 is in direct communication with a source of pressurefluid. However, nothing further will happen unless strut 22 has beenmoved to its effective position, as shown in Fig.2, by oscillation ofbellcrank 25 in a clockwise direction about its pivot. It will beobvious that when pressure fluid is supplied to cylinder 3|, piston 3|moves up as already described, but at the same time, cylinder 3| movesdownwardly to oscillate the bellcrank. Member 31 on the bellcrank exertsa yielding pressure tending to move strut 22 counterclockwise as viewedin Figs. 1 and 2, and when the strut snaps into its effective position,as shown in Fig. 2, a shoulder 19 on bellcrank 25 contacts the stem 4|,thus opening valve 40. This action alone produces no immediate results(except as hereinafter describedr because the exhaust through valve 40is pre-v vented by a check valve 80, not previously de-. scribed, whichcommunicates by conduit 8| with conduit GI and valve casing 54. If theoperator is maintaining manual 58' in its operative posi f tion 50 as tohold exhaust valve 56' closed, at

t the time strut 22 reaches effective position and valve 40 is operated,nothing will happen because the pressure on opposite sides of valve willbe substantially equal and spring 82 will serve to. maintain the valveclosed.v If, however, manual.

58' is released, fiuid in conduit 8| will be ex hausted through valve56', check valve 80 will open, pressure will be relieved in the lowerportion ofv cylinder 3| and in conduit 39, and on continue its downwardtravel, thus contacting piston rod |8 so as to apply power to lever 28,strut 22 and head lever l3, so as to close the press under finalpressure. When the pressing operation is completed, the operator'willactuate manual 68 which will permit fluid to exhaustfrom above piston ITthrough conduit 66 and valve 64. Springs 42, 44 and 16 will then'returnthe parts to press open position.

The parts are so designed that spring 16 is compressed and strut 22reaches effective position before piston contacts rod l8. However, acertain amount of adjustment is necessary in the fielddue tocompressionof padding on the pressing members, wear of the parts, etc., so thatfurther adjustment of this point of contact is provided by the member 45which limits the position of the upper end of rod l8, as biased byspring, when thepress is in open position.

An examination of the drawings'willshow that .In the modification shownin Figs. Ito 7.1 utilize the same press, structure and control mechanismalready described, modifying, only the connection between the powerleverand the head lever andthe position of the auxiliary motor. Thismodified structure comprises a strut 22a which is adapted to extenddownward through the bifurcated end 41 of'power lever 20 when the pressis in open position as' shown in Fig. 4. jThe motor 24a performs afunction similar to the motor 24 already described, that is to say,the'piston rod 32a is connected'by a bracket 83. with, the strut 22a,and, the cylinder 3l'a is pivotally connected at 84 with one arm of abellcrank member 85, the other arm of which carries a bearing block'86which is adapted upon-proper] bellcrank oscillation to move between thelower end of strut 22a and the bifurcated end "of the.

power lever to thereby form an effective-motion transmitting mechanismbetween the power lever. Bellcrank 85 is pivotally mounted on pins 81which are reciprocatinglyand the head lever.

mounted .by bars 88 in a bracket 89 which is pivotally mounted to swingabout the point 2|. Barsv88 are yieldingly hel'cl inbracket 89 so as topermit a slight movement of pin 81 and bellcrank 85 when pressure isapplied by power lever 28 through the strut 22a. The cylinder of motor24a is connected by a conduit 39a with the main powercylinder in themanner described in Figs l to 3. The cylinder of motor 2411 alsocommunicates by conduit 9|] with a. normally closed exhaust valve 40amall respects similarto valve 40 and operable by its stem Ma whichcontacts with a portion of bellcrank 85 when the parts reach effectiveposition to accomplish the same purpose as similar mechanism describedin Figs,

1 tov3.

It is thought unnecessary to describe the operation of the modificationof Figs. .4; to? in detail as itis' in all respects analogous to that.already described. The first portion of I the power stroke of the mainpiston forces fluid under pressure into motor 24a, causingthepistonthereof to move upward which moves the head lever toward closedposition, and simultaneously causingfthe cylinder thereof to movedownward which moves pressure block 86 into. effectivepo:

sition as soon as strut 22a permits suchmove ment. With the parts intheposition of- Fig. 5,

valve 40a is opened which, when check, valve 83' opens upon release of amanual as alreadydescribed, relieves the trapped fluid beneaththe mainpiston, 'andthis permitssufiicient .rnove-.

ment of the mainvpiston to actuate the power lever so as to act uponstrut 22a to close the press under final pressure. ,1 y

What I claim is:

1. A. pressing machine comprising cooperating relatively movablepressing members, a fluid actuated cylinder and piston motor forproducing such movement, motion transmitting mechanism'eflective duringthe latter part of the piston stroke for applying final pressure betweensaid members and including separable parts efiective to transmit motiononly when the pressing members are in close proximity, powertransmitting mechanism operatively connectedwith said piston forproducing relative motion between said pressing members and eifectiveduring the first part of the piston stroke to move said members to closeproximity and to couple said parts in eilfective position, and operatorcontrolled means for actuating said motor. I

2. A pressing machine comprising cooperating relatively movable pressingmembers, a cylinder and piston motor for producing said relativemovement, motion transmitting mechanism effective during the latter partof the piston stroke for applying final pressure between said membersand including separable parts effective to transmit motion only when thepressing members are in close proximity, power transmitting mechanismoperatively connected with said piston during the first part of itsstroke for relatively moving the members to close proximity and for moving said parts to effective position, operator controlled means foractuating said motor, and means for preventing the latter portion ofsaid piston stroke until said parts are ineffective position.

3. A pressing machine comprising a pair of cooperating relativelymovable pressing members, a cylinder and piston motor for causing saidrelative movement, the piston'of said motorhaving power transmittingmechanism operatively connected therewith for producing relativemovement between said pressing members and effective during the firstpart of said piston stroke to preliminarily close the press, motiontransmitting mechanism having an operative connection with said pistonfor causing relative movement of said pressing members into finalpressure position, there being a lost motion connection between saidpiston and said, last named mechanism, said last-named mechanism havingparts ineffective to transmit motion in press open position, and meansoperated by said power transmitting mechanism for making said partseffective to transmit motion.

4. In a press of the class described, cooperating relatively movablepressing members and operating mechanism therefor comprising av cylinderand piston motor having operative connec-,

tions with one of said members for causing final pressure between saidmembers, a second cylinder and piston motor constructed and arranged tocause relative approach between said members with lower power than saidfirstmotor, means for compressing a fluid by operation of said firstmotor, and means for supplying said compressed fluid to said secondmotor.

5. In a press of the class described, cooperating. relatively movablepressing members and meansfor causing pressure therebetween including afluid actuated motor, operator operated means for controlling the supplyof pressure fluid to the motor, said motor being arranged for a shiftingmovement responsive to predetermined resistance to relative'movementofsaid pressing members, and means actuated by said motor shiftingmovement for connecting said motor directly to a source of motive fluid.V

6. In a press of the class described, cooperating relatively movablepressing members, a fluid actuated cylinder and piston motor, therebeing a lost motion connection between the piston and piston rod of saidmotor, motion transmitting mechanism between said rod and one of saidpressing members for applying final pressure thereto, a second fluidoperated motor having operative connections for preliminarily closingsaid press, and means for supplying to said second motor fluidcompressed by movement of said piston in said first motor while takingup said lost motion connection.

7. A pressing machine comprising cooperating relatively movable pressingmembers, a fluid actuated cylinder and piston motor having a lost motionconnection between its piston andpiston rod, motion transmittingmechanism between said rod-and one of said pressing members for applyingfinal pressure thereto including separable parts adapted to be coupledand uncouparts, a second fluid actuated motor for preliminarily closingsaid press and coupling said parts, means for supplying to said secondmotor fluid compressed by movement of said piston in said first motorwhile taking up said lost motion connection, said compressed fluid beingtrapped in said motors when said press is preliminarily closed to arrestthe movement of said piston of said first motor short of eflectivecontact with its piston rod, and means for releasing said trapped fluidwhen said parts are coupled.

8. A pressing machine comprising cooperating relatively movable pressingmembers, a cylinder and piston motor for producing said relativemovement, motion transmitting mechanism effective during the latter partof the piston stroke for applying final pressure between said-membersand including separable parts effective to transmit motion only when thepressing members are in' close proximity, power transmitting mechanismoperatively connected with said piston during the first part of itsstroke for relatively moving the members to close proximity and formoving said parts to eflective position, operator controlled means foractuating said motor, and means for normally preventing the latterportion of said piston stroke and including a device actuated to pistonactuating position by said parts upon reaching effective position and amanual controlled by the operator, whereby upon said parts reachingeffective position and upon operation of said manual final pressure isproduced. I 9. A pressing machine comprising coacting relatively movablepressing members, fluid actuated power means for relatively moving saidmembers to close the press, said power means including a cylinder andpiston motor, said piston having an operative connection with one ofsaid pressing membera said cylinder having a support providing a lostmotion connection, manually operated means for supplying motive fluid tothe working face of said piston, means actuated by the taking up of saidlost motion connection for supplying motive fluid to the working face ofsaid piston independently of said manually operated means, said powermeans being arranged to trap fluid in said motor in advance of saidpiston whereby said piston is held and said cylinder takes up said lostmotion connection, and means actuated upon release of said manuallyoperated means for exhausting said trapped fluid. v

10. A pressing machine comprising a frame, a pressing bed on said frame,a head lever pivends, a pressing head on one end of said lever andmovable'therebyinto and out of engagement with said bed, a pry barpivotally mounted on said frame, a motor for actuating said bar, apressure strut pivotal'ly carried by the other end of said head leverand movable into and out of power transmitting relation with said prybar, a pivoted bell-crank having one arm operatively connected with saidstrut, a second motor having cylinder and piston elements, one of saidelements being connected with said head lever to move it inpress-closing direction, the other of said elements being connected withthe other arm of said bell-crank for moving the same to actuate saidstrut into power transmitting position, and means for operating saidmotors. 7

11. A pressing machine comprising a frame, a pressing bed on said frame,a head lever pivotally mounted on said frame intermediate its ends, apressing head on one end of said lever and movable thereby into and outof engagement with said bed, a pry bar pivotally mounted on said frame,a motor for actuating said bar, a pressure strut pivotally carried bythe other end of said head lever and movable into and out of powertransmitting relation with said pry'bar, the end of said strut in powertransmitting position lying over an opening in said bar, a pivotedbell-crank having one arm arranged to position a bridging abutment oversaid opening, a second motor having cylinder and piston elements, one ofsaid elements being connected with said head lever to move it inpress-closing direction, the other oi said elements being connected withthe other arm of said bell-crank for moving the same to actuate saidabutment into bridging position, and means for operating said motors.

12. A pressing machine comprising coacting relatively movable pressingmembers, fluid actuated power means for relatively moving said membersto close the press, said power means including a fluid motor havingcylinder and piston elements, one of said elements having an operativejconnection with one of said pressing members, the other of saidelements having a support providing a lost motion connection, said powermeans being arranged to trap fluid in said motor in advance of themovable element thereof whereby said movable elementis held and saidother element takes up said lost motion connection, manually operatedmeans for supplying motive fluid to said motor, means actuated by thetaking up of said lost motion connection for supplying motive fluid tosaid motor independently of said manually operated means, and

' means for releasing said trapped fluid.

13. A pressing machine comprising cooperating pressing membersrelatively movable to preliminary closed position and to final pressingposition, power means for relatively moving said members including fluidcompressing means and a motor for causing relative approach movementbetween said members to preliminary closed position, two-hand controlmeans for said compressing means, means for supplying said compressedfluid to the preliminary closing motor, and means for causing furtheractuation of said power means to cause final pressure between saidpressing members.

14. A pressing machine comprising cooperating relatively movablepressing members, a motor and connected power transmitting mechanism forrelatively moving said members to apply final pressure between them,said mechanism includ ing separable parts adapted to be coupled whensaid pressing members are in safe-closed position, means normal ytending to uncouple said parts, a motor for coupling said. parts,two-hand control means for said coupling motor, said final pressure.motor having an energizing c rcuit and a control member therefor: aridactuating means for said control member including a part'offsaidtwo-hand control means and apartoperated by placing of said pressingmembers in sale-closed position.

15. A pressing machine comprising cooperating pressing membersrelatively movable to preliminarily closed position and to finalpressing position, a motor and connected power transmitting mechanismfor relatively moving said members to apply final pressure between them,said mechanism including separable parts adapted to be coupled anduncoupled, one of said parts being carried'by a movable pressing memberto coupling position only when the press is in preliminarily closedposition, meansnormally tending to uncouple said parts, a motor forcoupling said parts, two-hand control means for said coupling motor,said final pressure motor having an energizing circuit and a controlmember therefor, and actuating means for said control member includingapart operated by placing said members in preliminarily closed position.

16. A pi'essingmachine comprising cooperating pressing membersrelatively movable to preliminarily closed position and to finalpressing position, a motor and connected power transmitting mechanismfor relatively moving said members to apply final pressure between them,said mechanism including separable parts adapted to be coupled anduncoupled, means normally tending to uncouple said parts, motor meansfor preliminarily closing said pressing members and for coupling saidparts, two-hand control means for said coupling motor, said finalpressure motor having an energizing circuit and ya. control membertherefor, and actuating means for said control member including a partof said two-hand control means and a part operated by movement of saidseparable parts to coupled position.

17 A pressing machine comprising cooperating inarily closed position andto final pressing position, a motor and connected power transmittingmechanism for relatively moving said members to apply final pressurebetween them, said mechanism including separable parts adapted to becoupled and uncoupled, one of said parts being movable to couplingposition only when the press is in preliminarily closedv position, meansnormally tending to uncouple said parts, a motor for coupling saidparts, two-hand control means for said coupling motor, said finalpressure motor having an energizing circuit and a control membertherefor, and actuating means for said control member including a partof said two-hand control means and a part controlled by movement of saidparts to coupled position.

18. In a press of the class described, cooperating relatively movablepressing members, fluid actuated power means for closing said press,means normally tending to open the press, operator controlled means forsupplying pressure fluid to said power means, means for establishing adirect connection between a source of fluid supply and said power meansincluding a shiftable part.v normally in fluid cut-off position, meanspressing members relatively movable to prelimtion thereof, means forshifting said shlftable part when said trapped fluid attains a.predetermined pressure, and means for releasing said retard said closingoperation, mechanism con.-

trolled by the pressure of said trapped fluid for byp ssing the operatoroperated means and for connecting said motor directly to a source ofmotive fluid, and means for releasing said trapped 20. A pressingmachine comprising cooperating pressing members relatively movable topreliminary closed' position and to final pressing position, a cylinderand piston motor, means operated by the first portion of said motorstroke for causing movement of said members into preliminary closedposition, means operated by the latter portion of said motor stroke forcausing movement of said members into final closed positlon, said motorbeing constructed and arranged to compress fluid ahead of said movingpiston by the said first portion of said motor stroke to prevent saidlatter portion of said stroke, and

of its stroke.

means for releasing said compressed fluid including a part actuated bymovement of said members into preliminary closed position, whereby saidmotor may then continue through the latter portion of itsstroke.

21. A pressing machine comprising cooperating pressing membersrelatively movable to preliminary closed position and to final pressingposition, a cylinder and piston motor, means operated by the firstportion of said motor stroke for causing movement of said members intopreliminary closed position, means operated by the latter portion ofsaid motor stroke for causing movement of said members into final'closed position, means controlled by said first portion of said motorstroke for retarding motor operation at the end of said first portion ofsaid stroke, and means for releasing said retarding means including apart actuated by movement of said members into preliminary closedposition, whereby said motor may then continue through the latterportion of its stroke unretarded.

22. A pressing machine as in claim 21 including a'twmhand safetycontrolled motive fluid supply for said motor, and a fluid supply forsaid motor independent of said first-named supply, and means forestablishing said latter supply by operation of said motor through thefirst portion JOSEPH P. DALY.

